Transmission-gearing.



vv. S. HARLEY. TRANSMISSION GEARING. APPLICATION FILED MAR. 11, 1913.

1,097,546. Patented N y 19, 1914.

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I Q m a 0 W. S. HARLEY. TRANSMISSION GEARING. APPLICATION FILED MAR.11, 191s.

Patented May 19, 1914.

B SHEETS-SHEBT 2 WWW W. S. HARLEY. TRANSMISSION GEARING. APPLICATION FILED MAR.11, 191a.

Patented May 19, 1914,

W. S. HAHLEX. TRANSMISSION GEARING.

APPLIOATION FILED MAR. 11, 1913.

Patented May 19, 1914.

6 SHEETSSHEET 4.

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W. S. HARLEY,

TRANSMISSION GEARI'NG.

APPLICATION FILED MAR. 11, 191sv Lfiw fifie Patented May 19, 1914 6 SHEETSSHEET 5.

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W. S. HARLEY.

TRANSMISSION GEARING.

APPLICATION FILED MAR. 11, 1913.

Patented May 19, 1914 6 SHEETS-SHEET 6,

UNITED STATES, P XEENT OFFICE.

WILLIAM S. HARLEY, 0F MILWAUKEE, WISCONSIN.

TBANSMISSION -GEARING. I

To all whom it may concern:

Be it known that 1, WILLIAM S. HARLEY,

a citizen of the United States, and resident trolling the application of power from a motor to the final driven member, the invention being particularly designed for use 1n con- 'neetion with motorcycle driving gear including all power transmission means from the motor to the traction wheel of such vehicles.

Specific objects of my invention are to provide an automatic clutch-controlled gear connection betweenv a crank-shaft and motor, whereby the motor may be started bymovement of the crank-shaft in one direction, it being understood that when the device is utilized in connection with a. motorcycle a manual operation is required to free the traction-wheel from said motor in order to start the latter while the vehicle is at rest.

Another object of my invention is to provide means in connection with the crank shaft for setting a traction-wheel brake by a reverse movement of said crank-shaft from that cfiected in .a motor starting operation. A further object of my invention is to provide means in connection with the crankshaft whereby reversal. of the direction of said shaft due to back-firing incidental to crai'lliing the engine is eliminated, the gear connection between the crank-shaft and motor being auton'iatically released under such conditions. Hence it will be ap 'iarent from the description following when the transmission gearing is applied to a motorcycle employingthe usual manually controlled clutch-lever in connection with the tractionwheel and the crankshaft, that the motor can. be cranked or started and the tractionwheel can be freed and the brake applied thereto and, in addition, accidents due to baclcfiring are eliminated.

lVith the above and other minor objects in view the invention consists in certain peculiarities of construction and combination Specification of Letters Patent.

Patented May 19, 1914.

i Application filed March 11, 1913. Serial No. 753,488.

of parts as hereinafter set forth with reference to the accompanying drawings and subsequently claimed.

In the drawings Figure 1 represents a sectional plan view of a portion of a motorcycle embodying the features of my. invention, the section being indicated by line 11 of Fig. .2; Fig. 2, a side elevation of the same look- 111g toward the gear side of said machine; Fig. 3, a similar side elevation looking from the reverse side with parts broken away to illustrate certain structural features; Fig. 4-, an enlarged detail sectional view of the pedal-carrying crank-shaft and its connections, the section being indicated by line 4-4 of Fig. 1; Fig. 5, an elevation of the same partly in section as indicated by line fi5 of Fig. 4; Fig. 6, a,cross-section of the crank-shaft mechanism, the sect-ion being indicated by line 6-6 of Fig. 4; Fig. 7, an enlarged detailed sectional view of the trac tion-wheel hub and its connections with a portion of the hub in full, and Fig. 8, a detailed cross-section of the crank-shaft mechanism, the section being indicated by line 88 of Fig. 4. p

Referring by characters to the drawings 1 represents the seat-mast of a motorcycle frame, and 2, respectively the upper and lower rear fork members, which members are connected at the point of intersection by a slotted head 4 that receives a rigid axle 5, the same serving as a support for the hub G of a traction-wheel 7 of ordinary construction.

Fix-ed in a suitable loop extension of the seat-mast is the usual type of motor A, the shaft of which carries a drive-wheel 8 in the form of a sprocket. Brazed or otherwise secured to the lower rear fork member 3 is a tubular hanger 9 having an eccentriher(' inafter described, the said belt tightencr mechanism being fully set forth in an application for patent filed by mcJuly 3, 1912, for lll'lPl'UVQIll-lllifl in transmission gearing, Serial Number 709160. In brief, as shown,

the above. described belt tightener.'mcchaf 12, the hub of which is rotatorily adjustable about one end of the tubular hanger, the ec centric shell being similarly ad'nsted within the latter, whereby after a belt-tightening operation the collar and (rank-shaft 11 are concentrically aliried. The bearing-collar 12 has mounted thereon the hub of a double faced power transmission wheel 13, which wheel is shown in the form of a stepped sprocket having toothed faces 14 and 15, the said wheel under normal running conditions being"rev olved concentric with the sleeved crank-shaft.

Carried by \the transmission wheel 1345 a hub member 13 that is provided with a series of ..internal fluted canrnotches 16,.

which cam-notchesare adapted to be en gaged by the rounded heads of dogs 17. As best shown in Figs. 4 and of the drawings, the dogs are pivotally mounted between flanges-oi? a collar 1.8, which collar is secured to a squared portion of the erai'ik-shaft. Each of the pivoted dogs 17 has a tail it) which is slotted for the reception of a stud 20, the r-dlll6 being carried by an end web 20 that abuts the collar 18, said web forming a part of a sleeve section 21, that is loosely mounted upon the crank-shaft 11 and is journaled in the eccentric bored shell 10 Hence the dogs constitute link eo meetions between the sleeve and crank-shaft, due to the fact that the tails of said dogs are con nected to the sleeve web. The inner end of the sleeve section 2-1 is 'li'ori'ned with notches or teeth 22 which engage corresponding teeth .22 of. a second sleeve section 21. that is also loosely mounted upon the c ank-shat't and is journaled in the bore of the shell, the said pair of sleeves in e'lleet constituting a single member. The notches or teeth of the pair of sleeve sections 21, 2t, have play therebetween, whereby said sections are permitted to rotate independently oi each other prior to ellecting a clutch connection through engagement of their teeth, due to which engagement the sleeve sections there after revolve as a unit. The :-'ttt l'itl sleeve section Ql' projects beyond. the tubular hanger l), the same carrying an. internal ratchet-wheel 2; and loosely mounted upon the hub of said ratrhetwvheel is a disk fZ-il, the latter carrying a series ol? pivoted pants 5 that are arranged to engage the ratchet wheel. The )an'ls :25 are provided with spring tails that: straddle and l'rielionally engage with the laces of said ratchet,-wheel, whereby they are diseneagwl tr/un the teeth thereof incidental to a rotation ol the eranlo shaft in the direction ol' the arrow as indi' rated in Figs. 5 and t3, in which forward direction the crank-shalt is revolved in order to etl'ect a starting or cranking operation with respect to the engine. it follows that should the crank-shall; and sleeve be rotated in a reverse direction from that mentioned,

'ed to be engaged by a second is as indicated by dotted arrow in Fig, 6, pawls will be caused to engage the ratel teeth of the wheel 23, whereby the dish will be moved in the same direction to rat feet a braking operation with respectto the rear wheel by means to be hereina 'l described The open face of tip ll. pawl housing is closed by a plate titled between a shoulder of the end face of the hanger fitting- As best shown in Figs. it and drawings the motor drive-w h ed by a belt 30 to the sproeh of the transmission wheel 13, t 15 being connected by a belt 3t wheel 32 that carries eorrespor teeth for engagement with th. Wheel is loosel mounted upon it the traetiomwieel. best sh 7, the drive-Wheel 32 is in this r ranged to be connected and d from the hub ll b a friction clu it mthed. in ex a traetr are carried by the rilrive-wheel l :rf sprint, pressed friction disks 34, all latter arr carried by a head 35 that is rl egi v to the traction wheel hub, driveavheel l2 locked or unit the hub of the traction-wheel 'l by lation a nut 36, which nut is tin r or outupon. a non-rotary threaded bloek ill", whereby the 'l'rictioirplates are expanrlml or contracted under spring control, at wh construction forms no part of in invention. As best shown in l of the drawings, the clutch not do with an our 38 that is linked to an hand-lever 3.), which lever is co sitioned. and later unednipon t. extends from the serdqnast '1 ol? Referring to lugs. 3 ings the disk 2st that crank-shaft 11, is UI'U the braking eranl': is 3 end of a, liaralte-liand. to. m oppe 12 which band is pra'inanently sernred to the casing-head. The outer face ol the brain band 46 is arrangljed to engage the inner lure of a housing shell. 48 that; is carried by llnl traction wheel hub 13, all of which ttlllf lrllltl 13 tion is clearly illustrated and dra'i'ilwil in the above referred to patentol March llhile I halve shown ainl t clutch and bralre :i: rhanmin trolling the traction wheel 7 and also a specific clutchfor effecting engagementbetween the double face transmission wheel 13 and pedal-carrying crank, it is apparent that I may, without departing from the spirit of my invention, embody various forms of such mechanical devices in carrying out my invention.

The pawl-carrying disk 24 is held in its position upon the sleeve section 21 by a suitable washer and nut 24, which nut is in threaded engagement with the end of said sleeve section. One end of the crank-shaft 11 is provided with an integral crank-arm 49 and the opposite end of said crank-shaft has attached thereto a similar crank-arm 49, the said crank-arm being frictionally engaged with the end of the crank-shaft and held in its position by a nut which is in threaded pansive force of the spring will thus tend to hold the aforesaid sleeve section 21 into position nvhile at the same time the spring also serves to draw the crankshaft and its clutch mechanism to thus hold the sleeve sections together.

When the crank-shaft and its sleeve memher are rotated forwardly or in the direction of the arrow as indicated in Fig. 5, the initial forward movement of the crankshaft is independent of or in advance of any sleeve movementowing to the frictional resistance of said sleeve, which sleeve is loosely linked to the crank-shaft collar 18 by the dogs as previously described. Hence the rounded heads or" the dogs 17 will move outwardly and assume an engaging position with relation to the cam-notches 16 of the wheel-hub 13. This action is due to the pintles of the dogs which are carried by the crank-shaft being advanced, while the tail-pieces 19 of said dogs are retarded by their slotted engagement with the lugs 20 of the sleeve .web :20. This clutching engagement between the cn'mk-shai't and geanwheel 18 1S eiiected tor cranking or starting the engine, which starting movement is imparted to said engine through the chain-belt connections therewith. Prior to the pedaling operation for cranking the engine, the operator shifts the actuating lever 39, ndiereby the nut 36 is rotated to release the friction clutch connection hetwcen the traction Wheel-hub G and the drive wheel 32 mounted thereon. Hence it is obvicas that whenv the engine picks up or is started the machine will remain at a standstill and when it is desired to impart drive to the't-raction-wheel the hand-lever 39 is simply manipulated in the reverse direction from that previously mentioned whereby the traction drive-wheel 32 is locked to the hub ofthe traction-wheel. Should the motor back-fire in a starting operation the direction of rotation of the gear-wheel '13 will bev reversed and this reversal will cause the fluted cam surfaces to become a drive mem-' her, which olive member will now rotate in the opposite direction from that imparted thereto by the application of foot power.- The fluted notches 16, co-incid'ent to reversal, will cause the roundedheads of the dogs 17 to be depressed or cammed downwardly due to; the fact that said fluted notches engage the rounded ends of the dogs forwardly of their axes. Hence said dogs will be" forceddownwardly and out of the line of travel of the notched surface 16 of tho'hub '13". The wheel 13 is thereby immediately disconnected from its locked engagement with the crank-shaft and will rotate idly in a reverse direction through motion imparted to said wheel by the premature explosion of the engine. By this provision it is apparent that injury to the operator through sudden reversed movement of the crank-carried 'ped als is averted, said pedals remaining in an inert position.

:When the machine is traveling it is obvious that the rear drive-wheel may be controlled by manipulation of the crank-shaft, the setting 01'' the brake mechanism being eifected by back-pedaling, whereby the dogs 17, which had been previously in clutching engagement with the hub 13 will be-retracted. After such retraction further rotation of the crank-shaft in the same direction will cause locking engagement between the pawls 25 and the sleeve ratchet-wheel 23. Hence .the disk will be rocked to effect a braking in an opposite direction from that aforesaid.

2. A transmission gearing comprising a crank-shaft, a sleeve loosely mounted theree on, pivoted dogs carried by the crank-shaft, tails extending from the dogs, a pin and slot connection between the sleeve and tails of said dogs, and a wheel loosely mounted lOt about the crank-shaft, the wheel being provided with a series of fluted cam-faces engageable with the heads of said dogs. a

3. A transmission gearing comprising a crank-shaft, a pair of sleeve'sections loosely mounted thereon, a play clutch connection between the sleeve sections, whereby initial I movement of one of said sections is effected independent of the com anion section, a collar secured to the cran shaft, dogs in ivotal union with the collar, tails exten ing from the do a pin and slot connection between the s eeve and tails of said dogs, a wheel loosel mounted about the crankshaft, the hu of said wheel being provided with a series of cam-faced notches engageable with the heads of the dogs.

4. A transmission gearing comprising a crank-shaft, a pair of sleeve sections loosely mountedv-thereon, a play clutch connection between the sleeve sections, whereby initial movement of one of said sections is effected independent of the com anion section, a collar secured to the cran shaft, dogs in ivotal union with thecollar, tails exten ing from the do s, a pin and slot connection between the s eeve and tails of said dogs, a wheel loosely mounted about the crankshaft, the hub of said wheel being provided with a series of cam-faced notches engageable with the heads of the dogs, a braking disk loosely mounted about the crank-shaft, and a clutch connection between the braking disk and one of the sleeve sections, whereby said clutching disk is actuated when the aforesaid crank-shaft is moved in one direction.

5. In a transmission gearing, a motor, a drive-wheel, and a crank-shaft;v the combination of a wheel loosely mounted about the crank-shaft, a belt connection between the crankshaft wheel and motor, a belt con nection between said crank-shaft wheel and drive-wheel, a sleeve loosely mounted about the crank-shaft, dogs in link connection with said sleeve and crank-shaft, and a series of:

fluted cam-notches carried by thetransmis sion wheel with which. the dogs are eng ed when the crank-shaft is moved in one (lll'fiil tion, the said'dogs being released from their engagement incidental to reversal of rota- 'tion of said crank-shaft wheel.

6. In a transmission gearing, a motor, a drive-wheel, and a crank-shaft; the com bination of a wheel loosely mounted about the crank-shaft, means for locking the eranlo shaft wheel to said crankshaft when the same is rotated in one direction, means for freeing the said crank-shaft wheelfrom its locking engagement with the crankshaft incidental to movement of the same in a reverse direction from that of the crank shaft, and belts connecting the aforesaid crankshaft wheel with the motor and drive wheel.

,7. In a transmission gearing,,a motor, crank-shaft, a drivesvheel, and a brakemechanism associated with the drive-wheel; the combination of a wheel loosely mounted about the crankshaft, means for locking the crankshaft wheel to said crank-shaft when 'n:

the same is rotated in one direction, means for freeing the crank-shaft wheel from its locked engagement therewith incidental to movement of said wheel in a reverse direction from that of the aforesaid crankshaft, belts connecting the crank-shaft wheel with the motor and drive-wheel, and a one-way clutch-controlled brake-actua ting means car ried by the aforesaid crank-shaft and connected to the brake mechanism, whereby 

